
The American Naturalist. 
ASSOCIATE EDITORS: 
J-A. ALLEN, PH.D., American Museum of Natural History, New York. 
. E. A. ANDREWS, PH.D., Johns Hopkins University, Baltimore 
WILLIAM S. BAYLEY, PH.D., Colby University, en ville. 
DOUGLAS H. CAMPBELL, PH.D, Stanford University. 
J HB. S.B., Cornell University, Ithaca. 
WILLIAM M. DAVIS, M. E; scm eis niversity, Cambridge. 
ALES HRDLICKA, M.D., U.S. -= ss Washington. 
LE m JORDAN, LED, Stanford jo 
CHARLES A. KOFOID, Pux.D., University af ae Berkeley. 
one J. G. NEEDHAM, PH.D., Lake Forest Unive: 
=< <> ARNOLD E- ORTMANN, PRD, ps Warm m, Pittsburg. 
- D. P. PENHALLOW, D.Sc- F.R.M.S., McGill University, Montreal. 
.H. M. RICHARDS, S.D., Columbia University, New York. 
W. E. RITTER, PH.D, — y California, Berkeley. 
== ISRAEL C. RUSSELL, LL.D., University of Michigan, Ann A 
MI WS ERWIN F. SMITH, S.D, U.S. nn of Agriculture, Washington 
na LEONHARD STEJNEGER, LL.D., Smithsonian Institution, Washington. 
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ur : ritten s so as to be =e instructive, and int 

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